Micro‐Alloyed Wrought Magnesium for Room‐Temperature Forming

In this work the development of a system of micro-alloyed Mg–Ag–Ca–Mn–(Zr) alloys is described. It involves grain refinement throughout the production chain of direct chill casting and extrusion. After extrusion the alloys reveal a homogeneous microstructure and a fine grain size of less than 10 μm. At room temperature they show an exceptionally high elongation to fracture – of more than 25 % – and a pronounced work hardening regime. Superplastic behaviour is observed at 360 °C.